Lightweight building material board

Details Lightweight building material board Lightweight building material board

B - Operations, Transporting

32

B

B32B 13/02 (2006.01) B28B 1/16 (2006.01) B28B 3/12 (2006.01) B28B 19/00 (2006.01) B28B 23/00 (2006.01) C04B 14/18 (2006.01) C04B 28/26 (2006.01) C04B 28/30 (2006.01)

Patent

CA 2051002

A lightweight wallboard having a density in the range of 10 pcf to 30 pcf and comprised of a faced layer of expanded siliceous inorganic particles, such as expanded perlite, bonded together by inorganic binder, such as sodium silicate. The board is made by depositing a mixture of particles, binder and water onto a moving web of facing material, contacting the mixture with an upper moving web of facing material, compacting the mixture to the desired shape and density and drying the resulting board. Fire resistant and water repellent versions of the formula are also disclosed.

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